"Sounds to me if CASA asked some of the OEMs in the interests of the safety"
Since when have CAsA been interested in "Safety"??
Its exactly as you allude, CAsA are a reactive , NOT a Proactive organization, besides Dick with the new maintenance reg's they seem determined to put through you'll probably be the only person who can afford to fly a certified aircraft on the Australian register.
But I wholeheartedly agree with what you are saying.